# @Author：silence
# @Email：792245022@qq.com
# @Date：2025/1/2 1:45

a = 10
b = 20
print(a and b)
print(a or b)
print(not (a and b))
print("================================")

score = 70
if (score >= 60 and score <= 80):
    print("成绩还不错")
